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CVE-2026-26158

CVE-2026-26158 · Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.

CVSS 7.0 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • red hat hardened images

    Versions
    • ≥ 1.37.0-7.2.hum1: Not affected (rpm)

    No fix published

  • red hat enterprise linux 6

    No fix published

  • busybox Debian:12

    Versions
    • 1:1.35.0-4
    • 1:1.35.0-4+deb12u1
    • 1:1.36.0-1~exp1
    • 1:1.36.1-1
    • 1:1.36.1-2
    • 1:1.36.1-3
    • 1:1.36.1-3.1
    • 1:1.36.1-4
    • 1:1.36.1-5
    • 1:1.36.1-6
    • 1:1.36.1-6~exp.1
    • 1:1.36.1-7
    • 1:1.36.1-8
    • 1:1.36.1-9
    • 1:1.37.0-1
    • 1:1.37.0-10
    • 1:1.37.0-10.1
    • 1:1.37.0-2
    • 1:1.37.0-3
    • 1:1.37.0-4
    • 1:1.37.0-5
    • 1:1.37.0-6
    • 1:1.37.0-7
    • 1:1.37.0-8
    • 1:1.37.0-9
    • 1:1.38.0-1
    • 1:1.38.0-2
    • 1:1.38.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Debian:13

    Versions
    • 1:1.37.0-10
    • 1:1.37.0-10.1
    • 1:1.37.0-6
    • 1:1.37.0-7
    • 1:1.37.0-8
    • 1:1.37.0-9
    • 1:1.38.0-1
    • 1:1.38.0-2
    • 1:1.38.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Debian:14

    Versions
    • 1:1.37.0-10
    • 1:1.37.0-6
    • 1:1.37.0-7
    • 1:1.37.0-8
    • 1:1.37.0-9
    Affected ranges
    • ECOSYSTEM: < 1:1.37.0-10.1

    Update to 1:1.37.0-10.1

  • busybox Ubuntu:Pro:14.04:LTS

    Versions
    • 1:1.20.0-8.1ubuntu1
    • 1:1.20.0-9ubuntu1
    • 1:1.20.0-9ubuntu2
    • 1:1.21.0-1ubuntu1
    • 1:1.21.0-1ubuntu1.4
    • 1:1.21.0-1ubuntu1.4+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:Pro:16.04:LTS

    Versions
    • 1:1.22.0-15ubuntu1
    • 1:1.22.0-15ubuntu1.4
    • 1:1.22.0-15ubuntu1.4+esm1
    • 1:1.22.0-15ubuntu1.4+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:Pro:18.04:LTS

    Versions
    • 1:1.22.0-19ubuntu2
    • 1:1.27.2-1ubuntu3
    • 1:1.27.2-1ubuntu4
    • 1:1.27.2-2ubuntu2
    • 1:1.27.2-2ubuntu3
    • 1:1.27.2-2ubuntu3.1
    • 1:1.27.2-2ubuntu3.2
    • 1:1.27.2-2ubuntu3.3
    • 1:1.27.2-2ubuntu3.4
    • 1:1.27.2-2ubuntu3.4+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:20.04:LTS

    Versions
    • 1:1.30.1-4ubuntu4
    • 1:1.30.1-4ubuntu5
    • 1:1.30.1-4ubuntu6
    • 1:1.30.1-4ubuntu6.1
    • 1:1.30.1-4ubuntu6.2
    • 1:1.30.1-4ubuntu6.3
    • 1:1.30.1-4ubuntu6.4
    • 1:1.30.1-4ubuntu6.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:22.04:LTS

    Versions
    • 1:1.30.1-6ubuntu3
    • 1:1.30.1-7ubuntu1
    • 1:1.30.1-7ubuntu2
    • 1:1.30.1-7ubuntu3
    • 1:1.30.1-7ubuntu3.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:24.04:LTS

    Versions
    • 1:1.36.1-3ubuntu1
    • 1:1.36.1-6ubuntu1
    • 1:1.36.1-6ubuntu3
    • 1:1.36.1-6ubuntu3.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:25.10

    Versions
    • 1:1.37.0-4ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:26.10

    Versions
    • 1:1.37.0-7ubuntu1
    • 1:1.37.0-10.1ubuntu2
    • 1:1.37.0-10.1ubuntu3
    • 1:1.38.0-3ubuntu1
    • 1:1.38.0-3ubuntu3
    • 1:1.38.0-3ubuntu4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:26.04:LTS

    Versions
    • 1:1.37.0-4ubuntu1
    • 1:1.37.0-7ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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